function btnConform(){
	var inputs = document.getElementsByTagName("input");
	for(var i=0, j=inputs.length; i<j; i++){
		var btn = inputs[i];
		if(btn.getAttribute("class") == "input_btn"){
			btn.onmouseover = function(){
				this.style.backgroundPosition = 'left -50px';
				return false;
			}
			btn.onmouseout = function(){
				this.style.backgroundPosition = 'left top';
				return false;
			}
		}
		if(btn.getAttribute("className") == "input_btn"){
			btn.onmouseover = function(){
				this.style.backgroundPosition = 'left -50px';
				return false;
			}
			btn.onmouseout = function(){
				this.style.backgroundPosition = 'left top';
				return false;
			}
		}
	}
}